This guy's letting on to be a dummy.

2 seconds sound clip from the The Cocoanuts (1929) movie soundboard.

You can hear this line at 01:02:12.895 in the DVD version of the movie.

Quote context

[...]

- None of your business.

- He is a desperate character.

- Mother, he isn't.

- Whenever a young fella shuts up and won't say anything, I've noticed it's generally on account of a woman.

- Who is she?

- None of your business. I won't say a word.

- You won't say anything.

- This guy's letting on to be a dummy.

- This bird you can't understand when he does talk.

- Is there anybody here who will talk?

- I will, but I can't think of anything.

- Well, if you won't tell me about it, you'll tell somebody else.

- Wait a minute. You mean to say that...

- That's enough. Come on.

[...]